Andrew,
How 'bout that! Rudder looking good - those open-end wrenches should add a whole lota strength to the layup!
BIG LITTLE WORK.
Dremel has no sawblade arbor cutters except itty bitty teeny weeny ones. For a long time I've used a #542 wheel to cut and work frp. Especially tight curves. But Dremel in their wisdom decided to obsolete them (they were a 1" scalloped metal wheel with carbide grit on both sides - which wore out too quick for me) - now there is #543 which is similar but has the grit only on the bottom of the wheel. Now it can't do any slice cutting. But you can sculpt with the grit on the bottom. $16 an arbored bit.
CUT FRP WITH DREMEL #426!
I was forced to try the 1 1/4" #426 reinforced (carborundum?) cut-off wheels. They come 5 to a pack for around $10, you assemble one onto an arbor and cut fiberglass reinforced plastic to your heart's content. They are thinner than the grit blade, cut deeper, cut quickly, throw little glass dust. Recently had to cut about 20' of 1/8" thick frp. That was cutting down into the surface and following a line. Don't think I changed at all the diameter of the one wheel I used. Very
The only problem was lugging the tool constantly.